699-(299+127)=699-299-127=400-127=273
解:699-(299+127)=(700-1)-{(300-1)+127}=700-1-300+1-127=400-127=273
原式等于699-299-127=273~回答完毕~~\(^o^)/~祝学习进步~~~
=699-299+127=400+127=527